Aims and objectives: Videostroboscopy (VSS) and electroglottography (EGG) are widely accepted essential tools in diagnosis and management of dysphonia. Larynx can also be examined by indirect mirror, rigid, or flexible laryngoscopy, but VSS provides superior visualization and recording of the vocal fold mucosal lesions producing dysphonia. The present study was conducted in order to determine the role of VSS and EGG to analyze vocal fold lesions before and 3 months after therapeutic intervention.
Materials and methods: This was a prospective observational study conducted over a period of 1.5 years. Thirty patients were enrolled after fulfilling the inclusion criteria.
Results: This study showed that the most common etiology of benign vocal cord lesions was acute laryngitis (26.7%). Mucosal waves were normalized after intervention for both right (n = 1, 3.3%) and left (n = 2, 6.7%) true vocal cord (TVC). Complete glottic closure was seen in 93.3% (n = 28) cases after intervention as compared to 40% (n = 12) cases during initial examination (p <0.01). Mean contact quotient was improved after therapeutic intervention, and the difference was statistically significant (p = 0.015).
Discussion and conclusion: Laryngeal lesions causing dysphonia are multifactorial. Early vocal fold lesions causing dysphonia may not be evident by conventional methods of laryngeal assessment including indirect and direct laryngoscopy. This study demonstrated that VSS and EGG provide comprehensive information regarding vocal fold pathology for both diagnosis and follow-up of patients having voice disorders.
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